The Amana-Goodman B1809911S Fan Timer, specifically the ST9120 electronic fan timer, serves as the critical central processing hub for your HVAC system. As an OEM Goodman replacement part, this integrated furnace control board manages the ignition, blower operation, and safety timings to ensure peak efficiency. This genuine Amana furnace circuit board is engineered for precision, directly replacing previous part numbers B18099-11 and B1809911. Designed specifically for high-performance service in PG090 and PG180 model series units, it facilitates seamless communication between your thermostat and mechanical components. Every board undergoes rigorous factory testing to maintain strict safety standards. By restoring proper fan delay and sequencing, this HVAC control board prevents short cycling and optimizes airflow, protecting your heat exchanger and improving indoor air quality through consistent fan management. Key Benefits OEM Precision: Guaranteed compatibility as a direct Amana Goodman replacement for legacy B18099 series boards. Enhanced System Efficiency: Optimizes blower motor timing to maximize heat transfer and reduce energy consumption. Plug-and-Play Installation: Designed for the PG090 and 180 series, ensuring wire-to-terminal accuracy during maintenance. Factory Tested: Each unit is verified at the manufacturer level to ensure out-of-the-box reliability. Common Questions How do I know if my furnace fan timer board is bad? Common signs of a faulty ST9120 control board include the blower motor failing to start, the fan running continuously even when the system is off, or erratic ignition sequences. Is the B1809911S compatible with older B18099-11 models? Yes, the B1809911S is the current, official manufacturer update for part numbers B18099-11 and B1809911, offering improved logic and reliability. Why should I choose an OEM Goodman fan timer over an aftermarket board? Using a genuine Amana-Goodman OEM part ensures that the safety timings and voltage tolerances align perfectly with your specific furnace's engineering specifications. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
